Atomic hydrogen is obtained by:
1. electrolysis of heavy water
2. reaction of water with heavy metals
3. thermal decomposition of water
4. passing silent electric discharge through hydrogen at low pressure
Permutit is:
1. hydrated sodium aluminium silicate
2. sodium hexa meta-phosphate
3. sodium silicate
4. sodium meta-aluminate
Hydrogen is not obtained when zinc reacts with:
1. cold water
2. dil. H2SO4
3. dil HCl
4. hot 20% NaOH
The volume strength of 1.5N H2O2 Solution is :
1. 4.8
2. 8.4
3. 3.0
4. 8.0
Very pure hydrogen (99.9%) can be made by which of the following processes ?
1. Mixing natural hydrocarbons of high molecular weight
2. Electrolysis of water
3. Reaction of salt like hydrides with water
4. Reaction of methane with steam
Para hydrogen at room temperature is:
1. Less stable than ortho hydrogen.
2. More stable than ortho hydrogen.
3. As stable as ortho hydrogen.
4. None of the above.
Hydrogen combines directly with:
1. Ca
2. Cu
3. Zn
4. Fe
Acidified solution of chromic acid on treatement with H2O2 yields :
1.
2.
3.
4.
What is formed when calcium carbide reacts with heavy water?
1. C2D2
2. CaD2
3. Ca2D2O
4. CD2